To build, you need O'Caml (including ocamlobjinfo), Perl, "tsort", and
possibly a few other minor Linux programs.

  $ make

To run the tests:

  $ make tests

To run Euchre or Crazy Eights:

  $ make
  $ ./bin/pip ./tests/full/crazy_eights.pip
  $ ./bin/pip ./tests/full/euchre.pip
